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Python language and design patterns. This book has strengthened my understanding of Python, and I believe that I am now a more knowledgeable Python programmer.
In our Animal class example we created multiple instance of an object named dog and cat. Each object has its own species, name, and color. The self argument is necessary to hold information for multiple instances of an object. The Main Method: Convention or Requirement? When I execute (run) animal_main.py, what gets printed?
What are objects • An object is a datatype that stores data, but ALSO has operations defined to act on the data. It knows stuff and can do stuff. • Generally represent: – tangible entities (e.g., student, airline ticket, etc.) – intangible entities (e.g., data stream) • Interactions between objects define the
We have been using objects all along: String Objects, Integer Objects, Directory Objects, List Objects... Defines the abstract characteristics of a thing (object), including the thing's characteristics (its attributes, fields or properties) and the thing's behaviors (the things it can do, or methods, operations or features).
Introduces Python’s special methods to realize class definition, inheritance, multiple inheritance, accessibility, polymorphism, encapsulation. Compare Python’s OOP methods with other OOP languages. Analyze their advantages and disadvantages. What’s Python? Python is a general-purpose, interpreted high-level programming language.
Collections of objects share similar traits (e.g., data, structure, behavior). Collections of objects will form relationships with other collections of objects. A class is a specification (or blueprint) of an object’s structure and behavior. An object is an instance of a class.
• It contains code for initializing a new instance of the class to a specific initial state (e.g. setting instance attribute values). • If no constructor is present, an empty object is created. >>> class Person:... def __init__( self, s ):... self.name = s..... def hello( self ):... print "Hello", self.name Constructor function taking ...
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